This chapter includes some compounds with biological signiﬁcance but not discussed in other chapters.
Section 1 Sulfur Compounds
Plants containing sulfur compound(s) have a distinct obnoxious odor. Examples are garlic, onions, leeks, and scallions. Some plants in the Cruciferarae family, such as Song-lan (Isatis tinctoria), Ting-li-zi (lepidium apetalum), Luo-bo or radish(Raphanus sativus), and Ji-cai (Capsella bursa-pastoris), smell of sulfur due to the sulfur compounds they contain. Most of these sulfur compounds have bioactivity and should be given attention.